Since you live in Iowa and it isn't exactly riding season I would purchase all elsewhere. Try on helmets somewhere to find a brand you like and get your size and get it online ... UNLESS the dealer had tricked you into thinking he is giving you $xxx free accessories for letting him sell you a a Spyder.
Your stock seat might feel good to you ... give it a try for a few hundred miles. I have 3k miles on my F3L stock seat and it feels OK to me.
Motorcycle Dave has great prices on headsets and he is very knowledgeable about them and will try to steer you towards what product you need based on your riding habits.
Save yourself some money by not buying at the dealer and you can get more farkles with your savings.